Question

Find the value of sec(theta°)cos(theta°) for the following values of theta.
a. theta = 120

Answer 1

sec(120°)cos(120°) = 1

Explanation:

given data

theta = 120

to find out

sec(theta°)cos(theta°)

solution

we have given equation

sec(theta°)cos(theta°) ......................1

put here value of theta in equation 1

= sec(120°)cos(120°) ..............2

we know sec(120°) =
`(1)/(cos120)`

so from equation 2

=
`(1)/(cos120)` cos(120°)

= 1

so sec(120°)cos(120°) = 1